A peek behind the Gatekeeper
blog.agilebits.com/2012/04/19/1password-final-touch-osx-mountain-lion
From the page
Saved with the link. Notes from 2007 to 2016 are mostly the page's own words, so this is probably an excerpt.
The remainder of this article is about answering the question so how does my Mac really know that an app comes from a trusted developer? I find the answer to that question fascinating, but it isnt simple. There is no shame in just accepting that it is all part of the magic of cryptography. But if youd like to know a bit more about that magic, read on.